Paul saacke



(No Model.)

. P. SAACKE.

REAMBR.

No. 595,346. Patented Dee. 14,1897.

@Mam

UNITED STATES PATENT OFFICE.A

PAUL SAACKE, OF PFORZHEIM, GERMANY, ASSIGNOR TO GEBRDER SAAOKE, OF SAME PLACE.

REAMER.

SPECIFICATION forming part of Letters Patent No. 595,346, dated December 14, 1897.

Application iiled October 12 1896. Serial No. 608,594. (No model.)

To a/ZZ whom it may concern:

Be it known that I, PAUL SAAoKE, a subject of the Grand Duke of Baden, residing at Pforzheim, in the Grand Duchy of Baden, Germany, have invented new and useful Improvements in Beamers, of which the following is a specification; r

This invention relates to a reamer the cutting edges of which are interrupted in such a manner that the places of interruption of one cutting edge are opposite to the subsequent cutting edge. By this arrangement of the intermediate spaces and the edges the latter when working take off the material left by the former. Owing to this arrangement the chip is broken in reamin g the hole- 'L'. e., the material to be reamed is taken away in the shape of very short chips. The neoessary amount of power is very considerably reduced by the diminished surface of application. The reamer works entirely noiseless. It is not stopped by the material taken away and the wall of the .boring does not show any roughness, but it is, even in the ease of very short holes, completely smooth. The reamers hitherto used do not offer these advantages, and, above all, they do not combine them.

In the drawings, Figure l is a side view of the invention; and Fig. 2 is a partial section on line A B of Fig. .1, the other half of Fig. 2 being. an end view of the reamer.

The reamer has a series of rowsv of teeth,

the teeth of each row being shown at Z, while the intermediate spaces are shown at c. The

lower edges of the teeth are slanting, thus 35 providing beveled teeth vtransversely of thel row. The rows are separated by grooves running longitudinally of the reamer, and by these groovesY the reamer may be ground true without danger of changing the form of the 4o teeth. The teeth of one row are opposite the spaces between the teeth of the next row and are double the width of said spaces.

I claim- A reamer adapted to make cylindrical bor 45 ings, comprising a body of cylindrical -form having cutting-teeth, interrupted by intermediate spaces,y the cutting-teeth of one series being displaced with respect to those of the other series so that a cutting-tooth of one se- 5o ries will be opposite a space of the adjacent series, the said teeth being double the width of the spaces lying opposite them and said teeth having a lower slant edge and being arranged in longitudinal rows with grooves run- 5 5 

